One simple way is to preoccupy your mouth. When you give your mouth something else to do while you read, you can disengage the speech mechanism in the brain, allowing what your read to go straight to your conscious awareness rather than being slowed down by your brain needing to figure out how to say the words first.

So chew some gum, hum, or eat lunch while reading and you may find yourself going through a ton of reading material like never before.